Aaron Katersky has the latest on the investigation into United Healthcare CEO Brian Thompson's murder, including investigators' first forensic match allegedly connecting suspect Luigi Mangione to the crime and what sources say detectives consider to be Mangione's confession; Mary Bruce has details on FBI Director Christopher Wray announcing he will resign before President-elect Trump takes office in January; Erielle Reshef reports on lawmakers sounding the alarm over the swarm of mysterious drones — sometimes dozens at a time — appearing in the sky in the Northeast, with officials calling for immediate action by federal authorities; and more on tonight's broadcast of World News Tonight with David Muir.

Aaron Katersky has the latest on the investigation into UnitedHealthcare CEO murder suspect Luigi Mangione as law enforcement sources tell ABC News that passages in a notebook recovered after his arrest show a growing malice toward the insurance company and executive; Whit Johnson has details on the American Airlines flight departing from New York's LaGuardia Airport forced to make an emergency landing at nearby JFK after a bird slammed into the plane's engines; as more states in the Northeast report seeing swarms of drones hovering overhead, Erielle Reshef reports on the Naval weapons station in New Jersey that has confirmed multiple instances of drones crossing into its airspace; and more on tonight's broadcast of World News Tonight with David Muir.